Although you don't have plans for the 9-18mm at all, I would not recommend buying it. The Panasonic 7-14mm is better in every way. I don't have issues that the other person posted about where it doesn't perform that great. Mine works quite well. I plan on picking up a fisheye for wider angle in the near future.
For Macro, you really are better off getting the 60mm. Switch to the 12-50 on days when you don't want to do strictly macro. The 12-50mm fits in the same port as the 60mm macro, so you don't need any additional ports for that, just a zoom gear.
I have an E-M5mkII in a Nauticam Housing. The 60mm macro is on my camera the most, with the 7-14mm for when I shoot wide angle.
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